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# UITimingCurveType.builtin

Use the built-in UIKit timing curves. Specify this value when you want to use one of the constants in the [`UIView.AnimationCurve`](/documentation/UIKit/UIView/AnimationCurve) type. Specify the desired curve using the [`cubicTimingParameters`](/documentation/UIKit/UITimingCurveProvider/cubicTimingParameters) property.

```
case builtin
```

---

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